131340403 has 2 divisors, whose sum is σ = 131340404. Its totient is φ = 131340402.

The previous prime is 131340401. The next prime is 131340409. The reversal of 131340403 is 304043131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131340403 - 2¹ = 131340401 is a prime.

Together with 131340401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (131340401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65670201 + 65670202.

It is an arithmetic number, because the mean of its divisors is an integer number (65670202).

Almost surely, 2^131340403 is an apocalyptic number.

131340403 is a deficient number, since it is larger than the sum of its proper divisors (1).

131340403 is an equidigital number, since it uses as much as digits as its factorization.

131340403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 131340403 is about 11460.3840686078. The cubic root of 131340403 is about 508.3148313490.

Adding to 131340403 its reverse (304043131), we get a palindrome (435383534).

The spelling of 131340403 in words is "one hundred thirty-one million, three hundred forty thousand, four hundred three".